Section 1. Plans and Specifications. The plumbing and drainage of all buildings, public and private, additions and alterations thereto, shall be executed under the direction of the Health Officer, in accordance with plans and specifications previously approved in writing by the local or State Board of Health; and suitable drawings and descriptions of said plumbing and drainage shall, in each case, be submitted and placed on file with the Secretary of the local or State Board of Health aforesaid. No part of the work shall be covered or concealed in any way until after it shall have been examined by and tested in the presence of the Health Officer.

After a plan has been approved, no alteration of the same shall be allowed except on the written application of the owner.

All material must be of good quality and free from defects; the work must be executed in a thorough and workmanlike manner.

Section 2. Registration. No plumber shall engage in or work at the business of plumbing unles he shall have first registered his name and place of business in the office of the Board of Health, and no person shall by display of sign or plumbing material advertise as a plumber unless he shall have been registered or licensed therefor. Notice of any change in the place of business of a registered or licensed master plumber shall be immediately given to the Board of Health.

Section 3. Notices. Every plumber, before doing any work in a building, shall, except in the case of repair of leaks, file at the office of said Board of Health, upon blanks for that purpose, an application for a permit.

Section 4. Connection with Sewer or Drain. The plumbing of every building shall be separately and independently connected outside the building with the public sewer, if such sewer is provided, or with a proper and sufficient private drain or sewer laid outside of the building, and if a sewer is not accessible, with a proper irrigation or purification system or cesspool. Several buildings may have a common sewer connection.

Section 5. Traps. The waste pipe of every plumbing fixture shall be connected with a water seal trap having an airtight and water-tight clean-out of sufficient size to give convenient access for cleaning all parts of the trap.

Section 6. Trap Protection. Traps shall be protected from loss of seal through syphonage, evaporation and clogging. Either non-syphoning traps, mechanical air vents or back air pipes may be used for such protection provided they conform to the requirements of a standard test for syphonage, evaporation and clogging applied to them in accordance with Sections 7, 8, 9 and 10.

(Alternative. A much better and simpler provision would be as follows:

Section 5. Traps. The waste pipe of every plumbing fixture shall be connected with a non-syphoning water seal trap having an airtight and watertight clean-out of sufficient size to give convenient access for cleaning all parts of the trap. Back air pipes for special trap venting shall not be used.

In this case Sections 6 and 11 will be omitted. But for places where the public are not yet convinced of the importance of this change, but prefer to leave back venting still optional, the first form and Sections 6 and 11 are given as a temporary compromise.) Section 7. Testing Apparatus. The test for efficiency in resisting syphoning action shall be applied by a standard testing apparatus constructed as follows: The apparatus shall be either hydraulic or pneumatic. When the hydraulic apparatus is used it shall be constructed as shown in Figure 1. When the pneumatic is preferred it shall be constructed as shown in Figure 2. Both are recommended as useful in checking one another. Or any modifications of these devices conforming to their principles or capable of measuring the siphoning and other actions occurring in plumbing work for which they are constructed, may be used. ,

Section 8. Hydraulic Apparatus. In the hydraulic apparatus a water supply connection at S is required with ball cock and float and a large water tank of X* gallons capacity; a two-inch vertical main pipe P from the tank having a trapped waste receptacle W at its lower end; a two-inch branch pipe B for connecting up the trap to be tested; a vacuum gauge G on the branch; a quick opening valve V on the main pipe above the branch, a second valve V on the branch B, and another valve V" at the lower end of the pipe below the branch. Also a back air connection A for coupling on the back-air pipes Figure 3.

The test on this apparatus shall consist in connecting the outlet arm of the trap, filled with water, to the branch pipe B by means of a coupling nut or other air-tight connecting device and discharging the contents of the tank through the main pipe by successively opening and closing the upper valve V ten times, leaving the valve open for five seconds each time, the lower valve V" remaining open during the test. The size of the tank is governed by the size of the water supply pipe and water pressure available. It should be sufficiently large to supply water for the ten successive discharges after one filling, the water entering the tank from the supply pipe continuously during the test.

The energy of the syphoning action produced by each of these ten discharges is ascertained from the pressure gauge G before the trap tests are made by closing the valve V and reading the gauge during the discharges. The purpose of the valve V" is to close the pipe when making the evaporation tests.

Section 9. Non-Syphoning Traps. Non-syphoning traps shall be considered effective and acceptable when they are found capable of maintaining a seal of not less than one Xth of an inch after the ten successive applications without refilling of the syphoning strains above described. The severity of the strains will be partly dependent upon the length of the main two-inch pipe from tank to waste receptacle. But it should be equal to the strains required to lower the seal of a four-inch round or pot trap having one and one-half inch inlet and outlet arms from four inches in depth to one Xths of an inch in the ten discharges.